Journal
DALTON TRANSACTIONS
Volume 45, Issue 24, Pages 9942-9947Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c6dt00234j
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Funding
- American Chemical Society Petroleum Research Fund [52119-DNI3]
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The effect of oxidatively stable L- and X-type additives on the activity of Cp*Ir catalyst precursors in the C-H activation of arenes has been studied. Turnover numbers for C-H activation of up to 65 can thus be achieved, as determined by H/D exchange in MeOH-D-4. In particular, carbonate additives are found to enhance the C-H activation reactivity of Cp*Ir(H2O)(3)(OTf)(2) (1) more significantly than L-type ligands investigated in this study. Based on these studies, Cp*Ir/carbonate systems are developed that catalyze the aerobic C-sp3-H oxygenation of alkyl arenes, employing air as oxidant.
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